Re: can the Organians disable "non-weapon" weapons?
I've often speculated (though certainly not concluded) that it was more of a widespread manipulation of mind and sensory perception than true heat. While not unlike that of the Talosian's abilities, it would be far in advance given the Organian's true evolutionary nature as pure energy beings. Regardless, If I recall correctly, they still had to concentrate their efforts to accomplish the task.
I've thought as well.
On the continent of wild endeavour in the mountains of solace and solitude there stood the citadel of the time lords, the oldest and most mighty race in the universe looking down on the galaxies below sworn never to interfere only to watch.